What could be the consequence of a major leak in the air brake system?

Answer: C — Loss of braking power and potential failure to stop safely

A major leak in the air brake system can significantly compromise the effectiveness of the braking mechanism. Air brakes rely on compressed air to create the pressure necessary for the brake pads to engage and slow down or stop the vehicle. When a leak occurs, it results in a loss of that required pressure, leading to a reduction or complete failure of the braking ability. This loss of braking power can make it difficult or impossible for the driver to stop the vehicle safely, increasing the risk of accidents and posing a serious safety hazard to both the driver and others on the road. It's critical for the integrity of the air brake system to be maintained to ensure that the vehicle can consistently and reliably stop when needed.